#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 0.0 0.0 23.1407949956547 56.96925073994872 -gcp 0.0 16206.0 23.139629949756923 56.954305643977555 -gcp 11949.0 16206.0 23.11946126020585 56.954773236224845 -gcp 11949.0 0.0 23.120618241696892 56.96971849454809 27_Rajons_Tukums_II_R/LNA_KFFDA_F106_1_5571N.jpg LNA_KFFDA_F106_1_5571N.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "0.0 0.0\n0.0 16206.0\n11949.0 16206.0\n11949.0 0.0" | \
  gdaltransform -tps -output_xy LNA_KFFDA_F106_1_5571N.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  LNA_KFFDA_F106_1_5571N.vrt LNA_KFFDA_F106_1_5571N.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES LNA_KFFDA_F106_1_5571N.cut.vrt LNA_KFFDA_F106_1_5571N.xyz